#include<stdio.h>
int demo(int n,int i)
{   
    if(i==7&&n%7==0)
        return 1;
    if(n%i==i-1&&demo(n,++i))
           return 1;
    return 0;

}
int main()
{   int flag=1;
    for(int i=1;flag;i++)
        if(demo(i,1))
            {
                printf("%d ",i);
                flag=0;
            }
    return 0;
}